LED based phototherapy device for photo-rejuvenation of cells

摘要

An improvement in a light therapy device including multiple light-emitting diodes (LEDs) positioned in a handheld portable device is disclosed. Where the housing and the LEDs are configured to have direct contact with the skin or tissue of the user without any intermediary materials, and light the surface and underlying layers of tissue for photodynamic stimulation of the cells. Two iterations of the device utilize light known to have a bactericidal effect in the case or acne or Rosacea. The devices are fabricated from an injection molded plastic housing. The housing contains an arrangement of 36-72 LEDs on a circuit board in an arrangement to provide even lighting over the skin or tissue surface.

主权项

1. A tissue therapy device comprising:
an enclosure; a circuit board secured within said enclosure; said circuit board including an array of at least four different wavelength light emitting diodes configured to provide photodynamic stimulation of a surface and underlying layers of cells of skin tissue, wherein the stimulation of cells increases production of collagen and elastin; a power jack that receives DC power and a power switch electrically connected to said array of light emitting diodes though a single current limiting circuit; said single current limiting circuit is one resistor; wherein operating current of each of said different wavelength light emitting diodes is from the single current limiting circuit; said single current limiting circuit and a voltage supplied to said power jack is selected so that at least one of said different wavelength light emitting diodes is overdriven to increase light output of said light emitting diodes beyond normal operating intensity and to further produce thermal heat from said light emitting diodes, wherein the single current limiting circuit consistently limits the current to all of the at least three different wavelength light emitting diodes to produce a skin temperate of between 97 and 106 degrees Fahrenheit from direct thermal conduction of said thermal heat from said light emitting diodes which are against or in close proximity to said skin tissue for predetermined period of time; and wherein said array of light emitting diodes against skin tissue produces a rise in skin temperature within a finite period of time without utilizing an optical system or any intermediary material to produce said rise in skin tissue temperature, and wherein the skin tissue receives all wavelengths simultaneously.